It's not that you shouldn't be using it necessarily, it's just that for many cases (games, procedural generation, graphics, many kind of simulations) it's unnec

It's not that you shouldn't be using it necessarily, it's just that for many cases (games, procedural generation, graphics, many kind of simulations) it's unnecessary and slow. In my experience if someone doesn't know if they need a cryptographicly secure random(), or if a given random() implementation is secure then they (a) don't need it or (b) are trying to implement something they shouldn't be.